Hi,
I have to calculate the time to drain a tank, I have found some formulas, but I wish to know If Simulation Multiphysics it has any way to interpretate the results, this is the workflow what I followed:
1. Import a CAD model from SImulation MP, for example a cylinder with a little extrude to represent the outlet.
2. Define the mesh, for boundary layer.
3. Define the Top surface as a inlet/outlet, and the bottom surface too, this two surfaces must be for exclusion for boundary layer.
4. Define like 5 seconds (Pparameters) with different steps between each second.
5. Check that the gravity is working.
6. Then Run de analysis.
The question is, If I use the equation for fluid drain in a tank or recipent, that equation gives me an idea for the time that the fluid leaves the recipient. For example:
t=(A√(2h_1 ))/(〖A_o C〗_q √g)
But, when I define the Open Channel Model Parameters, define a time, like 10 seconds.,with several steps for each second.
For example, when I run, I have just see the results. That results appears like the flow it has continusly flow, not likes the aire displace the water. Y have just tried to read the User Guide (http://wikihelp.autodesk.com/Simulation_Mechanical/enu/2013/Help/0031-Autodesk31/0193-Analysis193/02...).
Then I need to estimate an approach about the time that I need to evacuate a fluid from a tank.
Please any help y I will aprecciate.
Regards,
Hello Jorge,
This may be a silly question, but what is the analysis type set to? (It should be set to Open Channel.)
I think you only need to define an inlet/outlet surface on the outlet of your model. There is no water entering the top of the model, so that surface is not an inlet/outlet.
Also, you did not mention that you defined the initial volume (model either completely filled or partially filled), but I assume you did that.
I attached the model that I want to calculate the time to drain....
Imagine all the solid filled with water....
From looking at the "Getting Started > Help > Tutorials" command, I do not see any tutorials for the Open Channel Flow analysis type. Perhaps one of the other readers has created an open channel flow model example/tutorial and can share it.
For setting the initial fluid volume, my suggestion is to go to "Getting Started > Help > Online Wiki Help" and type "initial volume" in the search box. This will lad you to the page titled Initial Fluid Volume which describes the procedure.